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authorMark Whitley2000-10-09 18:56:47 +0000
committerMark Whitley2000-10-09 18:56:47 +0000
commit872138de50b1c5bbf105b0243f5778fcb02b310b (patch)
treebae88fc4587a4d0aa9ec228c1006f4b364d0633e /cmp.c
parent7a86e61a54f75c6c457be177fb20f6dde27c06d3 (diff)
downloadbusybox-872138de50b1c5bbf105b0243f5778fcb02b310b.zip
busybox-872138de50b1c5bbf105b0243f5778fcb02b310b.tar.gz
Added cmp and readlink applets from Matt Kraai.
Diffstat (limited to 'cmp.c')
-rw-r--r--cmp.c65
1 files changed, 65 insertions, 0 deletions
diff --git a/cmp.c b/cmp.c
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+/* vi: set sw=4 ts=4: */
+/*
+ * Mini cmp implementation for busybox
+ *
+ *
+ * Copyright (C) 2000 by Lineo, inc.
+ * Written by Matt Kraai <kraai@alumni.carnegiemellon.edu>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include "busybox.h"
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+
+int cmp_main(int argc, char **argv)
+{
+ FILE *fp1 = NULL, *fp2 = stdin;
+ char *filename1 = argv[1], *filename2 = "-";
+ int c1, c2, char_pos = 1, line_pos = 1;
+
+ /* parse argv[] */
+ if (argc < 2 || 3 < argc)
+ usage(cmp_usage);
+
+ fp1 = xfopen(argv[1], "r");
+ if (argv[2] != NULL) {
+ fp2 = xfopen(argv[2], "r");
+ filename2 = argv[2];
+ }
+
+ do {
+ c1 = fgetc(fp1);
+ c2 = fgetc(fp2);
+ if (c1 != c2) {
+ if (c1 == EOF)
+ printf("EOF on %s\n", filename1);
+ else if (c2 == EOF)
+ printf("EOF on %s\n", filename2);
+ else
+ printf("%s %s differ: char %d, line %d\n", filename1, filename2,
+ char_pos, line_pos);
+ return 1;
+ }
+ char_pos++;
+ if (c1 == '\n')
+ line_pos++;
+ } while (c1 != EOF);
+
+ return EXIT_SUCCESS;
+}